Irreversible defects nyob rau hauv seamless steel raj yuav tsum tau muab pov tseg tag nrho. Kho los ntawm vuam, txoj kab uas hla expansion, los yog lwm txoj kev yog nruj me ntsis txwv tsis pub kom muaj kev ruaj ntseg ua hauj lwm nyob rau hauv kev kub siab, kub kub, los yog corrosive tej yam kev mob.
I. Cov Cai Tswj
1. Immediate Isolation: Once defects such as internal folds, delamination, inclusions, through-cracks, porosity, severe wall thickness unevenness, bulges, or deep scratches (>30μm) tau lees paub tias yog qhov tsis tuaj yeem hloov tau, lub raj hlau yuav tsum tau muab tshem tawm tam sim ntawd los ntawm cov khoom tsim nyog los tiv thaiv kev siv tsis raug.
2. Kev Kos Npe thiab Cov Ntawv Teev Tseg: Daim ntawv qhia meej meej (xws li "×" lossis "scrap") yuav tsum tau ua rau ntawm lub raj tsis zoo, thiab cov khoom tsis xws luag, qhov chaw, thiab cov ntaub ntawv batch yuav tsum tau muab sau tseg kom yooj yim tracing cov txheej txheem ntau lawm.
3. Kev pov tseg hauv nruab nrab: Cov hlau nplaum yuav tsum tau muab khaws cia rau hauv ib cheeb tsam uas tsim nyog kom tsis txhob muaj kev ntxhov siab nrog cov khoom tsim nyog. Tom qab ntawd lawv tuaj yeem rov ua dua li cov hlau seem.
II. Cov qauv siv tau
Raws li lub teb chaws tus qauv GB / T 8163-2023 "Seamless Steel Pipes for Transporting Fluids,"
1. Seamless steel kav siv rau kev thauj cov khoom siv hluav taws xob los yog cov tshuaj lom neeg tsis raug tso cai rau kev kho qhov tsis xws luag. Txhua yam teeb meem uas pom pom yuav tsum ua rau tsis lees txais tam sim ntawd.
2. Tsis tas li ntawd, cov qauv kev lag luam rau petrochemicals, boilers, thiab cov hlab ntsha siab (xws li SH/T 3405 thiab GB 150) kuj qhia meej tias cov kav hlau uas muaj qhov tsis xws luag yuav tsum tsis txhob siv rau hauv siab -cov khoom siv coj los ua kom muaj kev nyab xeeb ntawm lub cev.
III. Cov lus pom zoo rau kev txhim kho ntxiv
Txhawm rau txo qhov tshwm sim ntawm qhov tsis xws luag, nws raug nquahu kom ua kom zoo dua los ntawm qhov chaw:
1. Txhim kho qhov kev soj ntsuam zoo ntawm cov yeeb nkab blanks kom tshem tawm cov porosity subcutaneous, suav nrog, thiab lwm yam tsis xws luag;
2. Txhim kho qhov kev tho thiab dov cov txheej txheem kom tsis txhob muaj cov folds sab hauv thiab delamination;
3. Tsis tu ncua calibrate cov cuab yeej kuaj xyuas kom ntseeg tau tias qhov rhiab heev ntawm ultrasonic thiab eddy kev ntsuas tam sim no ua tau raws li cov qauv.
